An apparatus for a near eye display includes an optical waveguide coupler adapted to be optically coupled to one or more light sources, a first prism optically coupled to the optical waveguide coupler, a second prism coupled to the first prism where the first prism faces a first side of the second prism, a spatial light modulator (SLM) optically coupled to the second prism where the SLM faces a second side of the second prism, and focusing optics optically coupled to the second prism where the focusing optics face a third side of the second prism.
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3. The apparatus of claim 1, wherein the focusing optics comprises a reflective lens configured to reflect light transmitted from the second prism.
5. The apparatus of claim 1, further comprising a non-polarized beam splitter between the second side of the second prism and the first prism.
6. The apparatus of claim 1, wherein the first prism is in contact with the second prism and the first prism has a higher refraction index than the second prism.
9. The apparatus of claim 8, wherein the first partial reflector surfaces have first tilted surfaces that are arranged in sequence along the first waveguide, wherein the second partial reflector surfaces have second tilted surfaces that are arranged in sequence along the second waveguide, and wherein the second partial reflector surfaces are larger than the first partial reflector surfaces.
10. The apparatus of claim 1, further comprising a waveguide of partial reflectors coupled to the optical waveguide coupler, wherein the waveguide includes partial reflector surfaces that have tilted surfaces that are arranged in sequence along the waveguide.
12. The apparatus of claim 11, further comprising an optical waveguide optically coupled to the first prism, wherein the first prism is further configured to transmit the modulated light from the second prism towards the optical waveguide, and wherein the optical waveguide is configured to transfer the modulate light to a holographic optical element (HOE).
17. The apparatus of claim 16, wherein the input light includes multiple color modes, wherein the first waveguide and the second waveguide comprise multiple reflector surfaces, and wherein increasing the reflector surfaces increases a uniform distribution of the color modes in an illumination area on the SLM.
19. The near eye display of claim 18, wherein the optical waveguide coupler includes parallel partial reflector surfaces configured to uniformly distribute color modes of the light in an illumination area on the SLM.
20. The near eye display of claim 18, wherein the optical waveguide coupler comprises staircase waveguides with wedge surfaces including steps configured to uniformly distribute color modes of the light in an illumination area on the SLM.
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August 17, 2022
December 10, 2024
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